Which Covid-19 vaccine should I get? Dr. Wen weighs in

Which Covid-19 vaccine should I get? Dr. Wen weighs in

And then there were three.

There are now three Covid-19 vaccines authorized for emergency use by the US Food and Drug Administration, manufactured by Pfizer/BioNTech, Moderna and Johnson & Johnson. All three will be distributed across the United States.

Many people are wondering which Covid-19 vaccine they should get: Is one better for certain groups of people? Given how many people still can't get any vaccine, will people have a choice? If so, which vaccine should they choose?

We asked CNN Medical Analyst Dr. Leana Wen for her advice. Wen is an emergency physician and visiting professor of health policy and management at the George Washington University Milken Institute School of Public Health.

Wen is also a volunteer participant in the Johnson & Johnson clinical trial, though she doesn't know yet whether she received the vaccine or placebo.

CNN: Can you explain the differences between the three FDA-authorized vaccines? What do we know about their safety and efficacy?

Dr. Leana Wen: The vaccines from Pfizer and Moderna were authorized first, back in December. They are similar to one another in that they are both developed using the mRNA platform. The Johnson & Johnson vaccine has just been authorized. It uses a different way of stimulating an